Seasonal variation of herbicide concentrations in prairie farm dugouts.
D000383:Agriculture; D004784:Environmental Monitoring; D005618:Fresh Water / Q000737:chemistry*; D006540:Herbicides / Q000737:chemistry*; D006801:Humans; D012525:Saskatchewan; D012621:Seasons; D012987:Soil; D014872:Water Movements; D014874:Water Pollutants, Chemical
D006540:Herbicides; D012987:Soil; D014874:Water Pollutants, Chemical